baber/WOPTO huggingface dataset:
Patent KR-20000040732-A (KR)
Title: Thin film transistor and method for manufacturing the same
Inventor: WOO JAE IK
IPC: H01L29/786
Filed: 1998-12-19
Abstract: PURPOSE: A thin film transistor and a method for fabricating the thin film transistor are provided to improve the quality of the thin film transistor by preventing a copper of a gate electrode from diffusing ITO an active layer. CONSTITUTION: A gate electrode(33) is formed on a semiconductor substrate(11). An anti-diffusing layer(35) is formed on the surface of the gate electrode(33). A gate insulation film(37), an active layer(39) and an ohmic contact layer(41) are sequentially formed on the anti-diffusing layer(35). Then, the active layer(39) and the ohmic layer(41) are patterned such that the gate insulation film(37) is exposed thereby removing remaining portion except for a portion corresponding to the gate electrode(33). Source/drain electrodes which are connected to the ohmic contact layer(41) is formed on the substrate(11).
Patent KR-20000040991-A (KR)
Title: Preparation method of circulating culture system with culture fluid of culture medium for only pine mushroom
Inventor: KIM GWANG HO
IPC: A01G31/02
Filed: 1998-12-21
Abstract: PURPOSE: Preparation method of circulating culture system with culture fluid of culture medium for only pine mushroom is provided, which is cheap, effect on replacement import, effective application of sources and prevention of pollution. CONSTITUTION: Process of Preparation method of circulating culture system with culture fluid of culture medium for only pine mushroom is made up of several steps. A first step is covering bed filled with pine mushroom with non woven fabric and is providing culture fluid through installation tube for solution supply and is storing emitted culture fluid into tool through drainpipe and line for culture fluid. A second step is mixing water with ion solution in culture fluid tank and then mixing culture fluid with the mixture and then is providing the new mixture to bed through line for culture fluid.
Patent KR-19990063358-A (KR)
Title: 반도체 웨이퍼 처리 방법 및 장치
IPC: H02N13/00
Filed: 1998-12-23
Abstract: 웨이퍼가 후속하여 처리될 때 최소 클램핑 전압을 정전 척(ESC)에 공급하기 위한 웨이퍼의 휨을 측정하기 위한 방법 및 장치가 개시되었다.  이 장치는 정전 척(12,120)과 제어장치(16,18,20)를 포함한다.  정전 척은 인가된 클램핑 전압에 좌우되는 클램핑 힘에 의해 웨이퍼를 클램핑하는 클램핑 표면(13,30)을 포함한다.  제어장치는 웨이퍼의 처리 이전에 웨이퍼의 고유 휨을 탐지하기 위해 사용되고, 웨이퍼의 후속하는 처리 동안 정전 척에 인가되어야 할 측정된 휨으로부터의 최소 클램핑 전압을 결정한다.  최소 클램핑 전압은 웨이퍼를 클램핑 표면에 단단하게 클램핑하고 웨이퍼의 과도한 휨 및 후면 마모를 방지하는 각각의 웨이퍼를 위한 값을 갖는다.  제어장치는 커패시턴스 휨 특정 툴(50,52,54) 또는 웨이퍼의 고유 휨을 측정하는 광학식 휨 특정 툴(20)과 정전 척 소프트웨어 제어부(18)를 포함한다.  정전 척 소프트웨어 제어부는 각각의 웨이퍼를 후속하여 처리하는 데 사용하기 위해 각각의 웨이퍼에 대한 연관된 웨이퍼 식별과 최소 클램핑 전압의 데이터를 저장 및 결정하기 위해 측정된 휨을 사용한다.
Patent KR-20000042857-A (KR)
Title: Repair circuit of semiconductor memory device
Inventor: SHIN GWANG SEOP
IPC: G11C29/00
Filed: 1998-12-28
Abstract: PURPOSE: A repair circuit of a semiconductor memory device is provided improve a repair yield rate through avoiding fail of the device caused by the incomplete cut of a fuse according to the operation of a battery. CONSTITUTION: A source voltage(VCC) is applied for flowing current to a second PMOS transistor(PM2) in a reference voltage generating unit(100). And, a current path to grounding(GND) is created via a resistance(R1). By the ratio of the currents supplied from the second PMOS transistor and flowing to the grounding, the voltage level of a node(N2) is determined. The voltage level is the threshold voltage of CMOS inverter circuit(10) for determining the output level. Thus, a reference voltage signal is outputted for controlling the output of a first PMOS transistor(PM1). If the reference voltage signal is low, the first PMOS transistor is turned on for supplying the source voltage to a fuse(F1). If the reference voltage signal is high, the first PMOS transistor is turned off for blocking the source voltage to the fuse.
Patent KR-20000043653-A (KR)
Title: Method for switching channel of vcr/tv
Inventor: LEE HWA DONG
IPC: G11B20/10
Filed: 1998-12-29
Abstract: PURPOSE: A method for switching a channel of a VCR/TV is provided to show a broadcasting program received through a previously set channel in a regular time interval and to select a user's needed channel when a VCR mode is switched to a TV mode. CONSTITUTION: A user set frequently watched broadcasting channels and inputs an ejecting key signal by finishing a watching of video. Broadcasting signals received through each set channels are played in regular time intervals. A selecting key is inputted in a point played a needed broadcasting program during playing the broadcasting program of each channel. The broadcasting program broadcasted in each channel is easily checked. And the channel received the needed broadcasting program is easily selected.
Patent KR-20000043834-A (KR)
Title: Data interface circuit
Inventor: PARK JONG BEOM
IPC: G06F12/00
Filed: 1998-12-29
Abstract: PURPOSE: A data interface circuit is provided to up/down a program of 24 bits per one time, and to execute a read/write with an internal memory, by use of a 8 bit parallel port which a 24 bit digital signal processor(DSP) interfaces to a host processor. CONSTITUTION: A data interface circuit comprises a digital signal processor(DSP)(130), and a host interface(120). The DSP processor(130) reads data in a memory area according to a read/write control signal, or writes the data to the memory area. The host interface(120) selectively activates the read/write control signal, simultaneously with transmitting a 8 bit address to the DSP processor according to a read or write mode setup of a host processor(110).
Patent KR-20000046520-A (KR)
Title: Received digital data monitoring method
Inventor: KIM BEOM SU
IPC: H04L1/22
Filed: 1998-12-31
Abstract: PURPOSE: A received digital data monitoring method is provided to precisely monitor whether input digital data is normal by using oscillation clocks of transition states of the input digital data. CONSTITUTION: A method comprises the steps of: initializing inner coefficient values(S1); inputting external clocks after initializing the inner coefficient values(S2); judging whether a logic value of the input digital value and a logic value of an inner variable is the same(S3); changing the logic value of the inner variable into the logic value of the input digital data if the logic value of the input digital data and the logic value of the inner variable are different(S4); and judging whether the inner coefficient value is higher than a certain coefficient reference value(S5).
Patent KR-20000046944-A (KR)
Title: Cleaning method of gate oxide membrane of thin film transistor
Inventor: AHN YONG BOK
IPC: H01L29/786
Filed: 1998-12-31
Abstract: PURPOSE: A cleaning method of gate oxide membrane of a thin film transistor is provided to improve the device characteristics and increase the yield of device. CONSTITUTION: A cleaning method of gate oxide membrane of a thin film transistor comprising; a polysilicone layer(20) and gate oxide membrane(30) are laminated on a lower layer(10), then formed a contact by a masking etching and remove the foreign materials(40) formed on the surface of gate oxide membrane(30) with a mixed solution of NH4OH, H2O2 and H2O(1:4:20); a wafer(50) formed with gate oxide membrane(30) are mounted on a wafer cassette(40), the wafers(50) are cleaned with D.I water(60) by HQDR(Quick Dump Rinse) process; remove the plasma damage portion(35) with HF mixed solution; the wafer(50) mounted on the wafer cassette are cleaned with D.I water overflow and dry with Iso prophyl alcohol(IPA).
Patent KR-20000064284-A (KR)
Title: 일정유량 절수밸브 및 그것을 이용한 샤워헤드
IPC: E03C1/084
Filed: 1997-07-31
Abstract: 본 발명에 따른 일정유량 절수밸브는 샤워헤드같은 유체방출부에 적용가능하며, 수도꼭지 최대개방시에 있어서도 절수상태하에서 유량감소가 있는 공기흡인혼합수를 방출한다. 
     본 발명은, 내경(r 1 )으로부터 내경(r 2 ;r 1 >r 2 )으로 직경이 변화하는 원추상 밸브시트표면(4)을 형성하는 주변벽(5)을 지니며, 내경(r 1 )측에 유체입구개구를, 내경(r 2 )측에 통기유통개구(7)를 구비하며, 주변벽에 마주하며, 소정의 각도를 두고 축방향으로 교차하여 연장하는 복수의 유체방사유출개구(9)를 구비한 밸브본체(2)와, 밸브본체의 내부에 있어서 축방향으로 이동가능하게 수용되는 가동밸브본체(3)를 포함하여 구성되며, 가동밸브본체(3)내에 있어서 원추상 밸브시트표면에 완전히 밸브시트당접하는 때에, 밸브본체의 유체입구개구측이 복수의 유체방사유출개구(9)의 각 상부에지측 개구부분(9A)을 통하여 외부에 연통하며, 밸브본체의 통기유통개구측이 복수의 유체방사유출개구의 각 하부에지측 개구부분(9B)을 통하여 외부에 연통하도록 형성된 일정유량 절수밸브 및 그것을 이용한 샤워헤드에 관한 것이다.
Patent KR-20000064408-A (KR)
Title: 박리력이낮은비강확장기
Filed: 1996-12-05
Abstract: 본 발명은 사람의 코의 비도(nasal passages)을 확장시키기 위하여 내부 구조 조직으로부터 외벽 조직을 분리시키기 위한 비강 확장기(10)에 관한 것이다. 상기 확장기(10)는 한쌍의 이격 단부면(20,22,46)을 구비한 트러스(16)에 의해 형성되고, 트러스는 서로를 향하여 힘을 가하면 복원력을 제공하고, 이 복원력은 단부 각각에 다수개의 홈(43a,43b,43c)을 지니고 트러스(16)의 대향 단부들 사이에 연장하는 탄성 밴드(30a,30b)에 의해 제공된다. 홈(43a,43b,43c)은 밴드(30a, 30b)의 두께의 ⅓ 이상을 초과하고, 탄성 밴드(30a, 30b)의 소정 위치에 분리부(82,82',82",82"',82"")를 포함할 수 있고, 상기 분리부(82,82',82",82"',82"")는 제1 탄성 밴드의 제1면을 교차하는 해당 분리부 연부에 의해 둘러싸여진다. 제2 밴드 및 유사한 밴드 또한 상기 트러스(16)에 제공될 수 있다.
Patent KR-19990072202-A (KR)
Title: 금속 절삭 공구 및 이와 함께 사용되는 교체가능한 심
IPC: B23C5/22
Filed: 1997-01-30
Abstract: 금속 절삭 공구는 적어도 하나의 삽입체 수용 포켓으로 형성된 공구 홀더와, 심의 가장자리를 따라 일체로 형성된 길다란 리브를 가지고, 상기 포켓의 가장자리를 따라 형성된 길다란 오목부 내에 해제가능하게 유지될 수 있는, 분말을 프레스 가공하고 소결하여 형성된 교체가능한 심을 포함한다.
Patent KR-20000010684-A (KR)
Title: Method and device for controlling construction machine
Inventor: TOZAWA SHOJI
IPC: E02F9/20
Filed: 1997-11-28
Abstract: PURPOSE: A method for controlling a construction machine is provided to improve the precision of finish by an operating member by repressing the increase of a delayed response band of a pump even in case of immediately after starting the drive of an arm apparatus. CONSTITUTION: A technique for controlling a construction machine in which an articulated arm mechanism installed in a construction machine body is driven by a cylinder actuator connected to a hydraulic circuit having pumps (51, 52) capable of varying its discharge pressure depending upon the manipulated variable by an operating member (8) and operated by the discharge pressures of the pumps (51, 52). By keeping the discharge pressures of the pumps (51, 52) above predetermined values even when the operating member (8) is at a non-driving position of the cylinder actuator, it is possible to suppress the response delay and the increase in dead zones of the pumps (51, 52) even immediately after the start of driving of the arm mechanism to improve finish accuracy by a work member.
Patent KR-20000016359-A (KR)
Title: Fabricating device and method of electric connector
Inventor: BRUECK ROLF
IPC: H01R4/50
Filed: 1997-06-03
Abstract: PURPOSE: An apparatus for fabricating an electric connector is provided to enhance reliability by fabricating the connector in a honeycomb-typed case and achieve stability in temperature variation. CONSTITUTION: The apparatus comprises a first contacting piece having an external conic structure and a second contacting piece having an internal conic structure. A surface of the external conic structure and that of the internal conic structure is formed with an inclination angle where the first and the second contacting pieces forms an auto-fixing conic joint. The inclination angle is decided according to material and/or surface state of the first and the second contacting pieces.
Patent KR-20000022417-A (KR)
Title: Reinforced channel-shaped structural member
Inventor: WYCECH JOSEPH S
IPC: B29C44/12
Filed: 1997-06-25
Abstract: PURPOSE: A reinforced channel-shaped structural member is provided to increase section stiffness and dampen vibration in channel-shaped sections in a highly efficient and reproducible manner. CONSTITUTION: A reinforced structural member has a channel-shaped laminate structure of a metal stamping, a channel-shaped foil and an intervening layer of structural foam. The reinforced structural member is formed by pressing a foil or a resin preform into a channel and thermally expanding the resin to form a structural foam. The foam has one surface which is bonded to and conforms to the wall of the channel-shaped member defining the channel and another (opposed) surface which is itself channel-shaped. An insert is disposed and bonded to the layer of structural foam and the insert geometry mates with that of the structural foam. The insert is a metal foil or plastic and has a thickness of from 0.002 to 0.100 inch.
Patent KR-20000051511-A (KR)
Inventor: GWAK UI JONG
IPC: A61P11/06
Filed: 1999-01-22
Abstract: PURPOSE: An extract of Lonicera Japonica for the treatment of asthma is provided. CONSTITUTION: A antiasthmatic preparation comprises a therapeutically effective amount of the extract, wherein the extract comprises 0.5-0.3 wt% of Loniceroside A, 0.5-3.0 wt% of Loniceroside B, 0.5-2,0 wt% of Lonicerin and 2.0-5.0 wt% of Loganin. The antiasthmatic is administered at dose of 480 mg/day or 720 mg/day in three times.
Patent KR-20000052007-A (KR)
Inventor: JANG JIN
IPC: H01L21/205
Filed: 1999-01-28
Abstract: PURPOSE: A method for forming a polycrystalline silicon layer by crystallization of an amorphous silicon is provided to reduce time and temperature required for the crystallization. CONSTITUTION: To form a polycrystalline silicon thin layer(16), an insulating layer(12) such as silicon oxide is first formed on a glass substrate(11), and electrodes(14) such as nickel are then formed on the insulating layer(12). The insulating layer(12) is then exposed to plasma when a radio frequency voltage is applied to the electrodes(14), and an amorphous silicon is then deposited on the insulating layer(12) while an electric field is applied through the electrodes(14). During the deposition of the amorphous silicon, a lower part of the deposited silicon is turned into silicide, and further, the silicide accelerates the crystallization of the amorphous silicon. Therefore, the amorphous silicon is crystallized into the polycrystalline silicon layer(16) as soon as the amorphous silicon is deposited.
Patent KR-19990072638-A (KR)
Title: 고체이미지센싱장치와그구동방법
IPC: H04N5/355
Filed: 1999-02-12
Abstract: 고체 이미지 센싱 장치에 있어서, 광전변환소자는 반도체기판상에 2차원 매트릭스형상으로 배열된다.     트랜스퍼 게이트부는 각 광전변환소자에 인접하여, 광전변환소자에 축적된 신호전하를 판독한다.     수직 CCD는 트랜스퍼 게이트부에 인접하여, 광전변환소자로부터 판독된 신호전하를 수직방향에 전송한다.     수평 CCD는 수직 CCD에서 전송된 신호전하를 수평방향에 전송한다.     전하검출부는 수평 CCD에서 전송된 신호전하를 검출하여 출력한다.     4 개의 수직 전송전극은 신호전하의 수직 방향의 상기 수직 CCD에 서로 인접하며 형성된다.    수직전송전극은 수직방향으로 서로 인접한 제 1 및 제 2 전송전극을 포함한다.     제 1 수직전송전극은 제 2 수직전송전극보다 긴 길이를 가지며, 트랜스퍼 게이트부의 제어를 겸한다.     이의 구동방법도 기재되어 있다.
Patent KR-20000056040-A (KR)
Inventor: KIM KYEONG SEOK
IPC: H04L12/26
Filed: 1999-02-12
Abstract: PURPOSE: A method for testing a cell bus switch of a polling-based asynchronous transfer mode(ATM) is provided to efficiently perform a look-up test of the cell bus switch by connecting with an ATM network to supply in-band communication in the ATM cell bus switch utilized for ATM cell switching in a digital subscriber line-access multiplexer(DSLAM). CONSTITUTION: A method for testing a cell bus switch of a polling-based asynchronous transfer mode(ATM) comprises the steps of: initializing a register of a cubit when a test process is started; deciding whether the cubit has to be enabled to complete the test process if the cubit is disabled, and if the cubit is enabled, deciding whether an interrupt-based test has to be performed; if so, enabling an interrupt mask of a central processing unit(CPU) utilized in a corresponding board, and performing an interrupt-based loop back test; and if the interrupt-based test is not selected, performing a polling-based loop back test.
Patent KR-20000056140-A (KR)
Inventor: KANG HYUN KON
IPC: G06F9/06
Filed: 1999-02-13
Abstract: PURPOSE: A device to prevent illegal program usage is provided to prevent illegal duplication of software by allowing the important functions of a software to be selected only by a limited number of character codes, disabling the main functions of the program when a software is illegally duplicated, and maximizing the difficulty of decoding the secret codes. CONSTITUTION: A device to prevent illegal program usage is composed of creation, selection, authorization, and transmission. Switching department(110) creates continual code, which is designed to select software's specified functions, by using keyboard and other buttons. Code generator(112) depends on the switching department to create several continual codes and to enable software's specified functions. Input/output port(114), CPU(116), and memory(118) that stores duplication prevention program are designed to enable a large number of new code signals to be authorized by the computer. Input/output port's output platform possesses a video port(120) designed to output image signals to CRT. Code generator possesses a code storage(214) that stores a large number of codes, a controller(212) that summarizes and controls the system in order to lead the code storage's stored data according to input requirements, serial output department(216) that directly transmits code storage's stored data, and pulse provider(210) designed to synchronously control the system.
Patent KR-20000060402-A (KR)
Inventor: PARK SEUNG TAE
IPC: H01J9/02
Filed: 1999-03-15
Abstract: PURPOSE: An equipment for fabricating an electrode of a plasma display panel is provided to increase a fabrication efficiency and to reduce a misaligned electrode ratio, by forming an electrode using a shaping roller. CONSTITUTION: An equipment for fabricating an electrode of a plasma display panel comprises a shaping roller(100) and a rolling roller(400) which roll an electrode material(500) to form an electrode(500'). A transfer part(200) transfers in a constant speed a substrate(300) on which the electrode(500') formed by the shaping and rolling rollers(100,400) is attached. The shaping roller(100) has a plurality of grooves which are spaced apart from each other and are formed along an outer circumference direction. The transfer part(200) consists of an elastic roller(200) so that constant pressure is forced to the substrate(300).
Patent KR-20000061412-A (KR)
Inventor: YANG IK BAE
IPC: C02F3/10
Filed: 1999-03-26
Abstract: PURPOSE: An organic matter, nitrogen and phosphorus treatment system using Anammox(ANaerobic AMMonia OXidation) denitrification and ciliate bio-media is provided, which is characterized that the system is removed nitrogen by Anammox denitrification which is using ammonia as electron donor and nitrate as electron acceptor. So Anammox reaction is able to treat nitrogen in low C/N ratio(2:1) as compared with a conventional denitrification(5:1) process. CONSTITUTION: An organic matter, nitrogen and phosphorus treatment system using Anammox denitrification and ciliate bio-media is characterized by comprising the following parts of: (i) an anaerobic tank(2); (ii) an Anammox denitrification tank(3); (iii) an aerobic tank(4); (iv) a distribution tank(5) for internal return to the Anammox denitrification tank(3); and (v) a settling tank(6). And the system is characteristics of using a ciliate fluidized media(9) in the Anammox denitrification tank(3) and a fixed media in the aerobic tank(4).
Patent KR-20000061821-A (KR)
Inventor: KIM NAK IN
IPC: E02F3/34
Filed: 1999-03-31
Abstract: PURPOSE: A lift boom prefabricated frame structure for a loader is provided, which removes the maximum reach by the movement of the movement axis of a point member and improves transferability remarkably. CONSTITUTION: A lift boom prefabricated frame structure for a loader comprises; a couple of actuators (24) fixed on the frame of a car body to be rotated; a couple of primary control links (30) fixed on a rear frame (20) to be rotated; a couple of secondary control links (34), which is placed to the rear of a primary control link (30) and is longer than a primary control link (30) and is fixed on a rear frame (20) to be rotated; a couple of coupling members (40) which a primary control link (30) and a secondary control link (34) are fixed on to be rotated mutually; a couple of arms (42) which a coupling member (40) is fixed on an end and a point member (44), on which an actuator (24) and a bucket (48) are fixed to be rotated, is fixed on the other end and rotates for a movement axis (50) of a point member (44) to move long the vertical moving course along by the movement of a control link (30, 34).
Patent KR-19990083159-A (KR)
Title: Cis-configurational unsaturated ester, process for producing the same, and fragrance composition containing the same
IPC: C07C33/30
Filed: 1999-04-13
Abstract: The present invention provides a cis-configurational unsaturated ester represented by the formula (1) <CHEM> (where R is a methyl group or a phenyl group, and n is 1 or 2> and also provides a fragrance composition containing the cis-configurational unsaturated ester in an effective amount. The cis-configurational unsaturated ester represented by the formula (1) can be produced by     reacting a cyclic vinyl ether represented by the formula (2a) <CHEM> (where n is defined as above) with a Grignard reagent represented by the formula (3a) RMgX (where R is defined as above, and X is a chlorine atom, a bromine atom or an iodine atom> in the presence of a triarylphosphine and not more than 0.05 mol of a nickel compound per one mole of the cyclic vinyl ether represented by the formula (2a) to give a cis-configurational unsaturated alcohol represented by the formula (4a) <CHEM>     (where n and R are defined as above); and subjecting this cis-configurational unsaturated alcohol to acylation with acetic acid or a derivative thereof to give the cis-configurational unsaturated esters represented by the formula (1).
Patent KR-19990083563-A (KR)
Title: 시모스입력버퍼보호회로
IPC: H03K19/0175
Filed: 1999-04-28
Abstract: 본 발명은 신호 버스를 따라 나타날 수 있는 어떤 고전압 신호(즉, 5V)로부터 입력 버퍼를 보호하는데 사용되는 저전압 CMOS 입력 버퍼 보호 회로에 관한 것이다. 상기 보호 회로는 또한 "핫 플러거블"로, 이는 상기 보호 회로가 전원이 없을 때(즉, VDD가 존재하지 않을 때) 어떠한 전류도 유도하지 않을 것을 의미한다. 상기 회로는 CMOS 전송 게이트를 포함하고, 필요한 보호 기능을 제공하기 위해 온칩(on-chip) 발생 기준 전압을 이용한다.
Patent KR-20000072851-A (KR)
Inventor: KIM YONG JAE
IPC: B29B17/00
Filed: 1999-05-01
Abstract: PURPOSE: A method of collecting and reproducing PET(polyethylene terephthalate) from used PET bottle is provided to get pure PET with low cost and a very little time. CONSTITUTION: The method of collecting and recycling PET form PET bottles comprises the following steps: (i) collecting the PET bottles and sorting with colors; (ii) getting powdered PET bottle by pulverizing the collected PET bottles with different ingredients of cap, cap retainer, labels and a low part of the bottle; (iii) making powdered PET by putting the powdered PET bottle in water to separate the ingredients of cap, cap retainer, labels and a low part of the bottle having different specific gravity from; (iv) heating the separated powdered PET in a solvent having a high boiling point with stirring to remove ingredients of labels and adhesives for the labels from the powdered PET; and then (v) adding N-hexane as a low boiling point of solvent to the powdered PET with stirring to remove remaining solvent.
Patent KR-20000073786-A (KR)
Inventor: JUNG CHEOL O
IPC: C08L7/00
Filed: 1999-05-14
Abstract: PURPOSE: A rubber sheet capable of being used between a carcass and a rim cushion in place of a tire chafer and improving the durability of a bead portion by lowering a compounding ratio of sulfur in the carcass and using an accelerator having excellent adhesion to nylon or polyester cords is provided which can improve the performance of a bead portion. CONSTITUTION: The rubber sheet for a chafer of tires having a thickness of 0.5 to 1mm is manufactured by using the rubber composition comprising 70 to 100 parts by weight of natural rubber, 0 to 30 parts by weights of styrene butadiene rubber, 40 to 50 parts by weight of carbon black having an iodine absorption of 30 to 41 mg/g and a pH of 7 to 11 and 0.8 to 1.2 parts by weight of dibenzothiazyl disulfide as an accelerator.